{"product_id":"jurgensen-mainspring-664-for-hamilton-6-0s-no-2621-steel","title":"Jurgensen Mainspring #664 for Hamilton 6\/0s No. 2621 - Steel","description":"\u003cp\u003e\u003cstrong\u003eJurgensen \u003c\/strong\u003eMainspring No. 664 for \u003cstrong\u003eHamilton\u003c\/strong\u003e 6\/0s movements, Factory No 2621 (2621A according to Jurgensen), steel, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Jurgensen","offers":[{"title":"Default Title","offer_id":49134976237876,"sku":"PMA-JURG0664S-02","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-05-2208.48.24.jpg?v=1779465024","url":"https:\/\/www.vintagetimeparts.com\/products\/jurgensen-mainspring-664-for-hamilton-6-0s-no-2621-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}